Improvement in trusses



UNITED STATES PATENT rrlct;O

T. L. HOUGH, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN TRUSSES.

Specication forming part of Letters Patent No. 56,562, dated July 24, 1866.

To all whom 'it may concern:

Be it known that I, T. L. HOUGH, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Spring-Trusses; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, and to theletters of reference marked thereon, like letters indicating like parts wherever they occur.

To enable others skilled in the art to construct and use the invention, I will proceed to describe it.

My invention consists in a novel manner of applying the pad and the spring that operates it to the band or body of the truss, whereby I am enabled to produce a very simple, cheap, and efficient article.

In the truss recently led by me a circular collar was used for attaching the spring to the band, and that necessitated bending the spring, which made it difficult and expensive to make, and also rendered it liable to break. It also necessitated the use of a stirrup to secure the 4 spring to the arm of the pad. By my present invention these difficulties are entirely obviated, and a much simpler and cheaper article is produced.

A represents a metallic hoop or band of the ordinary construction, and being concave on its outer surface. Within this concave portion, at one end, is secured a small metall block or piece, l, having a journal, c, projecting from its end, on which is pivoted the arm or lever C, to which the pad issecured, as shown in Figure l. To the rear face of the piecel a plate, n, is secured, which projects out even with the edge of the arm C, the latter being secured to its journal c by a nut, o, as shown in Fig. 2.

A at spring, a, is secured to the rear face 0;" the arm C by a screw, e, as shown, this spring being curved, so that it will rest against the face of the arm G at a short distance from the screuT c, its upper end bearing against the inner face of plate n, as shown clearly in Fig. l, thus exerting its force to press the pad forward and upward.

The pressure ofthe spring may be varied to any desired extent by simply turning the screw c in or out, according as it is desired to increase or decrease its pressure. By these means I am enabled to produce a very cheap, simple, and etcient truss, and one that is not liable to become deranged.

Having thus described my invention, what I claim is- The arm C, pivoted upon the journal c, and having the spring a, attached thereto, with its free end operating against the plate n, substantially as shown and described.

T. L. HOUGH. 

